How do designers take inspiration from other artists work?

I was wondering how does a designer, take inspiration from other artists work may it be a photograph, a painting they might have done of people from the 19th century, it amazes me, as i can't see it, What do they look for and how do they carry it forward?

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VPN is (Virtual Private Network) were first used by companies to enable their employees to securely access internal systems such as email remotely (e.g. from home or while on business trips). Today they are increasingly being used for personal use by individuals to protect their privacy while online in public places (e.g. when using the wi-fi connection in a cafe) or in a country where the internet is censored / blocked (e.g. China, Saudi Arabia…).